Production process method of pipe whip restraint steel structure of main power house of nuclear power station conventional island

Abstract

The invention belongs to the technical field of pipe whip restraint steel structures of main power houses of nuclear power station conventional islands, in particular to a production process method of the pipe whip restraint steel structure of the main power house of the nuclear power station conventional island, which comprises the lofting process, the marking-off and scribing process, the cutting processing process, the bevel processing process, the hole-making process, the correction process, the polishing surface, the material splicing process, the pre-splicing process of a steel member, the assembly process, the processing process of a friction surface, the welding process of the steel structure and the anti-slip test of the friction surface of the steel member before leaving a factory, sandblasting, derusting and coating of a base coat are carried out in the factory, and the production of the steel structure is divided into the production processing of a welded H-shaped steel column, the production of a steel beam, the assembly and the welding of a support part, the production of a combined steel beam, the assembly and the welding of a girder box body and an inclined support below the girder box body, and the assembly and the welding of a pipe whip restraint key. The production process method can improve the drilling precision, utilize a numerical control planar drilling machine to complete the drilling on a gusset plate, determine a variety of processing processes and welding process parameters, and ensure the dimension of the member after the assembly and the smooth proceeding of field installation.

Description

technical field [0001] The invention belongs to the technical field of the anti-slash steel structure of the conventional island main factory building of the nuclear power plant, and particularly relates to a manufacturing process method of the anti-slash steel structure of the conventional island main factory building of the nuclear power station. Background technique [0002] In the steel structure engineering of nuclear power plants, the structure that plays a vital role in safety is the anti-shock steel structure of the plant, which is located between the nuclear reactor and the power plant. Driven by huge energy, the pipeline is swayed, and then the structure of the nuclear reactor is damaged. The anti-slam steel structure can effectively form a strong isolation protection layer outside the nuclear reactor to avoid the occurrence of hazards. The anti-swing steel structure of the conventional island main powerhouse of Hongyanhe Nuclear Power Station Phase I in Liaoning i...

AI Technical Summary

Problems solved by technology

However, in the boat-shaped welding process scheme, the four welds are welded in four times, which is prone to distortion and deformation

Once distortion occurs, it is difficult to correct the existing equipment, and it needs to be corrected many times with flames. The cost of correction is very high, and even the product will be scrapped if it cannot be corrected.

In addition, the connection relationship of the slam-resistant steel structure is complicated, there are many connection nodes, high-strength bolts are used for connection, and there are many connection holes. The previous manufacturing methods have caused great difficulties for on-site installation. The holes often cannot be connected, and the perforation rate cannot be guaranteed.